本乘方算法，只能计算整数long范围内乘方，主要是练习信号处理

 

#include
     
      #include
      
       using std::cin;using std::cout;using std::endl;long pows(long base,long time);int main(){    long t1,t2;    for (;;)    {        try        {            cout<<"Please input the base number and how many times it is multiplied?"<
       
        <<"example:8 13."<
        
         >t1>>t2;            if (cin) cout<
         
          <
          
           >tmp_test; if (cin&&tmp_test=='n') break; } catch (std::range_error err_ra) { cout<
           
            <
            
             max) { throw std::length_error("Too big a number"); } else { sum*=base; } } return sum; }}